Process of tanning fur skins.



ROBERT NASSE, OF ST. PAUL, MINNESOTA, ASSIGNOR OF ONE-HALF 130 AUGUSTPROHOFSKY, OF ST. PAUL, MINNESOTA.

.rnoenss No Drawing.

To all whom it may concern Be it known that I, Bonner NASSE, a citizenof the United States, residing at St. Paul, in the-county of Ramsey andState of Minnesota, have invented a new and useful Improvement for a NewProcess in Tanning Fur Skins, of which the following is. aspecification. I v

This invention relates to the process of tanning fur skins, by means ofa tanning solution composed of aluminum potassium sulfate, sodiumchlorid, sodium borate, and

water, and a solution composed of wheat flour, brewers yeast, alcohol,and water, and has for its object to make the'process more expeditiousand givea skin which is softer and more full oflife when tanned. l

Heretofore in tanning fur skins with a solution of aluminum potassiumsulfate, sodium chlorid, etc., the skin needed considerable working withoil and other fat elixers to soften them after the tanning process, andeven then, they would not always be soft and pliable. With the oldprocess of tanning, the skins seemed to deteriorate rapidly after beingtanned, while with my process, the skins remain the same and seem toretain the life and softness.

In my process of tanning I use a solution made up of ingredients in theproportions approximately as follows: aluminum potass1um sulfate 1 00pounds, sodium chlorid' 80 pounds, sodium borate 3 pounds and 25 gallonsof water. I then make up a second solution of ingredients and proortions approximately as follows: wheat Sour, 100 pounds, brewers? yeast1 pound, alcohol one qplnt and adding water to make 28 gallons.- hesolution of wheat-flour, yeast, alcohol and water isdeft to fermentabout two days before usm F r convenience I term the first solution ofaluminum potassium sulfate, sodium chlorid and water, the mineraltanning solution, and the second solution composed of wheat flour,yeast, alcohol and water. the organic solution.

In the rocess of tanning, I take about 8 gallons 0 the mineral tanningsolution and add suflicient water to make a ten per cent.

solution, to which I add i gallons'of the organic solution and about 10pounds of bran, then applying this solution on the flesh side of theskins and place them flesh Specification of Letters Patent.

'leaving the fiber looser and allowing more perfect action of. thetanning liquor. It be- I ing an undoubted fact that the bacteria in thefermented "solution feed upon thehide substance.

By my improved process, the skins are very much finer in quality and thelength of time for finishing the same is materially reduced, suchas inthe saving of working the skins to soften them after they have beentanned. I,

If it is desired to have a thin leather on the skins, I treat the samewith a solution of mild white soap and water which is boiled togetherand left to stand for some time before using. This soap solution isapplied warm with any good fur oil and the skins placed flesh to fleshafter this solution has been applied and left for several hours.

Having described my invention, what I claim is:

1. The process of tanning fur skins consisting in treating the skinswith a solution of aluminum potassium sulfate, sodium chlorid, sodiumborate and water, mixed with a solution of wheat flour, brewers yeast,alcohol and water, in about the proportions specified.

2. The process of tanning fur skins consisting in treating the skinswith a solution of aluminum potassium sulfate, sodium chlorid, sodiumborate andwater, mixed with'a fermented organic solution of theingredients named in about the proportions specified. I I s 3. Theprocess of tanning fur skins con- Patented J an. 2, 191?. Applicationfiled January a, 1916. Serial a... 69,776.

sisting in treating the skins with a mineral tanning solution mixed witha fermented solution of wheat flour, yeast, alcohol and ents and inabout the proportions herein specified.

Witnesses:

H. L. Frsem. A. L. Knmmr.

ROBERT NAssn.

